2 * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
3 * Copyright (C) 1999-2003 Hiroyuki Yamamoto & the Sylpheed-Claws team
4 * This file (C) 2004 Colin Leroy <colin@colino.net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
34 #include "pgpinline.h"
35 #include <plugins/pgpcore/sgpgme.h>
36 #include <plugins/pgpcore/prefs_gpg.h>
37 #include <plugins/pgpcore/passphrase.h>
38 #include "quoted-printable.h"
42 extern struct GPGConfig prefs_gpg;
44 typedef struct _PrivacyDataPGP PrivacyDataPGP;
46 struct _PrivacyDataPGP
50 gboolean done_sigtest;
52 gpgme_verify_result_t sigstatus;
56 static PrivacySystem pgpinline_system;
58 static gint pgpinline_check_signature(MimeInfo *mimeinfo);
60 static PrivacyDataPGP *pgpinline_new_privacydata()
64 data = g_new0(PrivacyDataPGP, 1);
65 data->data.system = &pgpinline_system;
66 data->done_sigtest = FALSE;
67 data->is_signed = FALSE;
68 data->sigstatus = NULL;
69 gpgme_new(&data->ctx);
74 static void pgpinline_free_privacydata(PrivacyData *_data)
76 PrivacyDataPGP *data = (PrivacyDataPGP *) _data;
77 gpgme_release(data->ctx);
81 static gchar *fp_read_noconv(FILE *fp)
90 array = g_byte_array_new();
92 while ((n_read = fread(buf, sizeof(gchar), sizeof(buf), fp)) > 0) {
93 if (n_read < sizeof(buf) && ferror(fp))
95 g_byte_array_append(array, buf, n_read);
99 FILE_OP_ERROR("file stream", "fread");
100 g_byte_array_free(array, TRUE);
105 g_byte_array_append(array, buf, 1);
106 result = (gchar *)array->data;
107 g_byte_array_free(array, FALSE);
112 static gchar *get_part_as_string(MimeInfo *mimeinfo)
114 gchar *textdata = NULL;
116 g_return_val_if_fail(mimeinfo != NULL, 0);
117 procmime_decode_content(mimeinfo);
118 if (mimeinfo->content == MIMECONTENT_MEM)
119 textdata = g_strdup(mimeinfo->data.mem);
121 /* equals file_read_to_str but without conversion */
122 FILE *fp = fopen(mimeinfo->data.filename, "r");
125 textdata = fp_read_noconv(fp);
129 if (!g_utf8_validate(textdata, -1, NULL)) {
131 codeconv_set_strict(TRUE);
132 if (procmime_mimeinfo_get_parameter(mimeinfo, "charset")) {
133 tmp = conv_codeset_strdup(textdata,
134 procmime_mimeinfo_get_parameter(mimeinfo, "charset"),
138 tmp = conv_codeset_strdup(textdata,
139 conv_get_locale_charset_str_no_utf8(),
142 codeconv_set_strict(FALSE);
144 tmp = conv_codeset_strdup(textdata,
145 conv_get_locale_charset_str_no_utf8(),
157 static gboolean pgpinline_is_signed(MimeInfo *mimeinfo)
159 PrivacyDataPGP *data = NULL;
160 const gchar *sig_indicator = "-----BEGIN PGP SIGNED MESSAGE-----";
161 gchar *textdata, *sigpos;
163 g_return_val_if_fail(mimeinfo != NULL, FALSE);
165 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
166 return FALSE; /* not parent */
168 if (mimeinfo->type != MIMETYPE_TEXT)
171 if (mimeinfo->privacy != NULL) {
172 data = (PrivacyDataPGP *) mimeinfo->privacy;
173 if (data->done_sigtest)
174 return data->is_signed;
177 textdata = get_part_as_string(mimeinfo);
181 if ((sigpos = strstr(textdata, sig_indicator)) == NULL) {
186 if (!(sigpos == textdata) && !(sigpos[-1] == '\n')) {
194 data = pgpinline_new_privacydata();
195 mimeinfo->privacy = (PrivacyData *) data;
197 data->done_sigtest = TRUE;
198 data->is_signed = TRUE;
203 static gint pgpinline_check_signature(MimeInfo *mimeinfo)
205 PrivacyDataPGP *data = NULL;
206 gchar *textdata = NULL, *tmp = NULL;
207 gpgme_data_t plain = NULL, cipher = NULL;
210 g_return_val_if_fail(mimeinfo != NULL, 0);
212 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
213 return 0; /* not parent */
214 if (mimeinfo->type != MIMETYPE_TEXT)
217 g_return_val_if_fail(mimeinfo->privacy != NULL, 0);
218 data = (PrivacyDataPGP *) mimeinfo->privacy;
220 textdata = get_part_as_string(mimeinfo);
227 /* gtk2: convert back from utf8 */
228 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
229 procmime_mimeinfo_get_parameter(mimeinfo, "charset"));
231 tmp = conv_codeset_strdup(textdata, CS_UTF_8,
232 conv_get_locale_charset_str_no_utf8());
235 g_warning("Can't convert charset to anything sane\n");
236 tmp = conv_codeset_strdup(textdata, CS_UTF_8, CS_US_ASCII);
243 textdata = g_strdup(tmp);
247 gpgme_set_textmode(ctx, 1);
248 gpgme_set_armor(ctx, 1);
250 gpgme_data_new_from_mem(&plain, textdata, strlen(textdata), 1);
251 gpgme_data_new(&cipher);
253 data->sigstatus = sgpgme_verify_signature(ctx, plain, NULL, cipher);
255 gpgme_data_release(plain);
256 gpgme_data_release(cipher);
263 static SignatureStatus pgpinline_get_sig_status(MimeInfo *mimeinfo)
265 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
267 g_return_val_if_fail(data != NULL, SIGNATURE_INVALID);
269 if (data->sigstatus == NULL &&
270 prefs_gpg_get_config()->auto_check_signatures)
271 pgpinline_check_signature(mimeinfo);
273 return sgpgme_sigstat_gpgme_to_privacy(data->ctx, data->sigstatus);
276 static gchar *pgpinline_get_sig_info_short(MimeInfo *mimeinfo)
278 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
280 g_return_val_if_fail(data != NULL, g_strdup("Error"));
282 if (data->sigstatus == NULL &&
283 prefs_gpg_get_config()->auto_check_signatures)
284 pgpinline_check_signature(mimeinfo);
286 return sgpgme_sigstat_info_short(data->ctx, data->sigstatus);
289 static gchar *pgpinline_get_sig_info_full(MimeInfo *mimeinfo)
291 PrivacyDataPGP *data = (PrivacyDataPGP *) mimeinfo->privacy;
293 g_return_val_if_fail(data != NULL, g_strdup("Error"));
295 return sgpgme_sigstat_info_full(data->ctx, data->sigstatus);
300 static gboolean pgpinline_is_encrypted(MimeInfo *mimeinfo)
302 const gchar *enc_indicator = "-----BEGIN PGP MESSAGE-----";
305 g_return_val_if_fail(mimeinfo != NULL, FALSE);
307 if (procmime_mimeinfo_parent(mimeinfo) == NULL)
308 return FALSE; /* not parent */
310 if (mimeinfo->type != MIMETYPE_TEXT)
313 textdata = get_part_as_string(mimeinfo);
317 if (!strstr(textdata, enc_indicator)) {
326 static MimeInfo *pgpinline_decrypt(MimeInfo *mimeinfo)
328 MimeInfo *decinfo, *parseinfo;
329 gpgme_data_t cipher, plain;
332 gchar *textdata = NULL;
334 const gchar *src_codeset = NULL;
335 gpgme_verify_result_t sigstat = 0;
336 PrivacyDataPGP *data = NULL;
341 if (gpgme_new(&ctx) != GPG_ERR_NO_ERROR)
344 gpgme_set_textmode(ctx, 1);
345 gpgme_set_armor(ctx, 1);
347 g_return_val_if_fail(mimeinfo != NULL, NULL);
348 g_return_val_if_fail(pgpinline_is_encrypted(mimeinfo), NULL);
350 if (procmime_mimeinfo_parent(mimeinfo) == NULL ||
351 mimeinfo->type != MIMETYPE_TEXT) {
356 textdata = get_part_as_string(mimeinfo);
362 debug_print("decrypting '%s'\n", textdata);
363 gpgme_data_new_from_mem(&cipher, textdata, strlen(textdata), 1);
365 plain = sgpgme_decrypt_verify(cipher, &sigstat, ctx);
366 if (sigstat && !sigstat->signatures)
369 gpgme_data_release(cipher);
376 fname = g_strdup_printf("%s%cplaintext.%08x",
377 get_mime_tmp_dir(), G_DIR_SEPARATOR, ++id);
379 if ((dstfp = g_fopen(fname, "wb")) == NULL) {
380 FILE_OP_ERROR(fname, "fopen");
382 gpgme_data_release(plain);
387 src_codeset = procmime_mimeinfo_get_parameter(mimeinfo, "charset");
388 if (src_codeset == NULL)
389 src_codeset = CS_ISO_8859_1;
391 fprintf(dstfp, "MIME-Version: 1.0\r\n"
392 "Content-Type: text/plain; charset=%s\r\n"
393 "Content-Transfer-Encoding: 8bit\r\n"
397 chars = gpgme_data_release_and_get_mem(plain, &len);
399 fwrite(chars, len, 1, dstfp);
403 gpgme_data_release(plain);
405 parseinfo = procmime_scan_file(fname);
408 if (parseinfo == NULL) {
412 decinfo = g_node_first_child(parseinfo->node) != NULL ?
413 g_node_first_child(parseinfo->node)->data : NULL;
415 if (decinfo == NULL) {
420 g_node_unlink(decinfo->node);
421 procmime_mimeinfo_free_all(parseinfo);
425 if (sigstat != GPGME_SIG_STAT_NONE) {
426 if (decinfo->privacy != NULL) {
427 data = (PrivacyDataPGP *) decinfo->privacy;
429 data = pgpinline_new_privacydata();
430 decinfo->privacy = (PrivacyData *) data;
432 data->done_sigtest = TRUE;
433 data->is_signed = TRUE;
434 data->sigstatus = sigstat;
436 gpgme_release(data->ctx);
444 static gboolean pgpinline_sign(MimeInfo *mimeinfo, PrefsAccount *account)
446 MimeInfo *msgcontent;
447 gchar *textstr, *tmp;
451 gpgme_data_t gpgtext, gpgsig;
453 struct passphrase_cb_info_s info;
455 memset (&info, 0, sizeof info);
457 /* get content node from message */
458 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
459 if (msgcontent->type == MIMETYPE_MULTIPART)
460 msgcontent = (MimeInfo *) msgcontent->node->children->data;
462 /* get rid of quoted-printable or anything */
463 procmime_decode_content(msgcontent);
467 perror("my_tmpfile");
470 procmime_write_mimeinfo(msgcontent, fp);
473 /* read temporary file into memory */
474 textstr = fp_read_noconv(fp);
478 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
479 gpgme_data_new(&gpgsig);
481 gpgme_set_textmode(ctx, 1);
482 gpgme_set_armor(ctx, 1);
484 if (!sgpgme_setup_signers(ctx, account)) {
489 if (!getenv("GPG_AGENT_INFO")) {
491 gpgme_set_passphrase_cb (ctx, gpgmegtk_passphrase_cb, &info);
494 if (gpgme_op_sign(ctx, gpgtext, gpgsig, GPGME_SIG_MODE_CLEAR)
495 != GPG_ERR_NO_ERROR) {
501 sigcontent = gpgme_data_release_and_get_mem(gpgsig, &len);
502 tmp = g_malloc(len+1);
503 g_memmove(tmp, sigcontent, len+1);
505 gpgme_data_release(gpgtext);
509 if (msgcontent->content == MIMECONTENT_FILE &&
510 msgcontent->data.filename != NULL) {
511 g_unlink(msgcontent->data.filename);
512 g_free(msgcontent->data.filename);
514 msgcontent->data.mem = g_strdup(tmp);
515 msgcontent->content = MIMECONTENT_MEM;
518 /* avoid all sorts of clear-signing problems with non ascii
521 procmime_encode_content(msgcontent, ENC_BASE64);
526 static gchar *pgpinline_get_encrypt_data(GSList *recp_names)
528 return sgpgme_get_encrypt_data(recp_names);
531 static gboolean pgpinline_encrypt(MimeInfo *mimeinfo, const gchar *encrypt_data)
533 MimeInfo *msgcontent;
537 gchar *textstr, *tmp;
538 gpgme_data_t gpgtext, gpgenc;
540 gpgme_key_t *kset = NULL;
541 gchar **fprs = g_strsplit(encrypt_data, " ", -1);
543 while (fprs[i] && strlen(fprs[i])) {
547 kset = g_malloc(sizeof(gpgme_key_t)*(i+1));
548 memset(kset, 0, sizeof(gpgme_key_t)*(i+1));
551 while (fprs[i] && strlen(fprs[i])) {
554 err = gpgme_get_key(ctx, fprs[i], &key, 0);
556 debug_print("can't add key '%s'[%d] (%s)\n", fprs[i],i, gpgme_strerror(err));
559 debug_print("found %s at %d\n", fprs[i], i);
565 debug_print("Encrypting message content\n");
567 /* get content node from message */
568 msgcontent = (MimeInfo *) mimeinfo->node->children->data;
569 if (msgcontent->type == MIMETYPE_MULTIPART)
570 msgcontent = (MimeInfo *) msgcontent->node->children->data;
572 /* get rid of quoted-printable or anything */
573 procmime_decode_content(msgcontent);
577 perror("my_tmpfile");
580 procmime_write_mimeinfo(msgcontent, fp);
583 /* read temporary file into memory */
584 textstr = fp_read_noconv(fp);
589 gpgme_data_new_from_mem(&gpgtext, textstr, strlen(textstr), 0);
590 gpgme_data_new(&gpgenc);
592 gpgme_set_armor(ctx, 1);
594 gpgme_op_encrypt(ctx, kset, GPGME_ENCRYPT_ALWAYS_TRUST, gpgtext, gpgenc);
597 enccontent = gpgme_data_release_and_get_mem(gpgenc, &len);
599 tmp = g_malloc(len+1);
600 g_memmove(tmp, enccontent, len+1);
604 gpgme_data_release(gpgtext);
607 if (msgcontent->content == MIMECONTENT_FILE &&
608 msgcontent->data.filename != NULL) {
609 g_unlink(msgcontent->data.filename);
610 g_free(msgcontent->data.filename);
612 msgcontent->data.mem = g_strdup(tmp);
613 msgcontent->content = MIMECONTENT_MEM;
619 static PrivacySystem pgpinline_system = {
620 "pgpinline", /* id */
621 "PGP Inline", /* name */
623 pgpinline_free_privacydata, /* free_privacydata */
625 pgpinline_is_signed, /* is_signed(MimeInfo *) */
626 pgpinline_check_signature, /* check_signature(MimeInfo *) */
627 pgpinline_get_sig_status, /* get_sig_status(MimeInfo *) */
628 pgpinline_get_sig_info_short, /* get_sig_info_short(MimeInfo *) */
629 pgpinline_get_sig_info_full, /* get_sig_info_full(MimeInfo *) */
631 pgpinline_is_encrypted, /* is_encrypted(MimeInfo *) */
632 pgpinline_decrypt, /* decrypt(MimeInfo *) */
638 pgpinline_get_encrypt_data,
642 void pgpinline_init()
644 privacy_register_system(&pgpinline_system);
647 void pgpinline_done()
649 privacy_unregister_system(&pgpinline_system);
652 #endif /* USE_GPGME */